The suitability of a language for a particular project doesn't just depend on language features. Most new languages will fade away without ever getting enough

The suitability of a language for a particular project doesn't just depend on language features. Most new languages will fade away without ever getting enough traction to survive. It's a real risk that is mitigated by corporate backing. Many people may have been aware of Kotlin's strengths but found themselves unable to justify its use for a mission critical task.